Abstract: A braking device for a motor saw including a rotatable brake drum (11), a brake band (12) surrounding the brake drum and actuatable by a spring (26) which is adapted to stretch the brake band around the brake drum, and a toggle joint mechanism (18,20) adapted to release the brake band from the drum against the action of the spring and to latch the braking device in an operating position in which the brake band is released from the brake drum. The toggle joint mechanism is actuatable by a control means (16) for adjusting the position of the brake band. The toggle joint mechanism is adapted, in the case of rupture of the brake band, to be adjusted by the spring to a position in which re-adjustment of the control means to the operating position is prevented.

Abstract: A device for controlling a carburetor of an internal combustion engine comprises a throttle control for controlling a throttle (12), and a choke control for controlling a choke valve (14). The throttle control comprises a latch means (15) which in the open position of the throttle prevents closing of the choke valve, and the choke valve comprises a corresponding latch means (16) which in the closed position of the choke valve limits the extent of opening of the throttle.

Abstract: In a chain saw including a housing (10) and a guide bar (11) provided with a saw chain (16), the guide bar is releasably attached at one of its ends to the housing and axially slidable by means of an adjusting means to adjust the tension of the saw chain. The adjusting means comprises a screw (17) extending generally parallel to the guide bar and having one end attached to the housing in a non-rotatable manner, and a nut (18) engaging the screw and being operatively connected to the guide bar in order to provide an axial adjustment of the guide bar by rotation of the nut. The nut is rotated by means of a gear (19, 20) having a drive shaft (21) extending through a bore (22) in the guide bar.